Thread: Hard CCI Primers

Hi, a few things to check, have you dismantled and checked the bolt is clean and in good condition? Are the primer pockets clean and primers seated properly, if not fully seated the firing pin may not strike the anvil hard enough to fire. I uniform my primer pockets with a Sinclair uniformer and when the primers are seated they are a few thou below the case head and I've never had a missfire with any brand of primer. Another thing to check is if your sizing die is correctly set to give the correct head space, Erik Cortina has a good video on YouTube on setting up your full length sizing die for correct head space. I don't have the shoulder comparator for my calipers so it takes a bit more trial and error to get it to 2 thou bump. If you still have miss fires it may be faulty primers, you could also get a gunsmith to check your firing pin.

I keep my rifle pretty clean and fully dissassemble the bolt after ever couple of trips. I'll look into the primer pocket side of things, as I clean these pretty well - the fact that it has only been two rounds has me perplexed. If it was doing something that wrong I thoiugh it would be more rounds. Still I've taken the things on board and I'll dig down deeper into it.

Originally Posted by Bert 71

Hi, a few things to check, have you dismantled and checked the bolt is clean and in good condition? Are the primer pockets clean and primers seated properly, if not fully seated the firing pin may not strike the anvil hard enough to fire. I uniform my primer pockets with a Sinclair uniformer and when the primers are seated they are a few thou below the case head and I've never had a missfire with any brand of primer. Another thing to check is if your sizing die is correctly set to give the correct head space, Erik Cortina has a good video on YouTube on setting up your full length sizing die for correct head space. I don't have the shoulder comparator for my calipers so it takes a bit more trial and error to get it to 2 thou bump. If you still have miss fires it may be faulty primers, you could also get a gunsmith to check your firing pin.

Deffinately this. A leaf is all it takes to get in there and cause issues with the firing pin. Tape up an alan key and wedge open your bolt assembly. Give the firing pin a bit of a clean. Might be all you need to do